A Global Tax on Wealth

Thomas Piketty, in his best-selling book, “Capital in the Twenty-First Century,” recommends a global tax on wealth. While it might be small, it would expose the amount of wealth hidden in tax havens and introduce real tax transparency, effectively blocking the dodges of Apple as detailed by Senator Warren.

Taxpayers of the world, unite! Demand that your governments endorse such a universal global tax.

JOYCE APPLEBY

Taos, N.M.

The writer is emerita professor of American history at the University of California, Los Angeles.

Correction:

A letter on Tuesday about a global tax on wealth misstated the first word in the title of a book by Thomas Piketty. It is “Capital in the Twenty-First Century,” not “Capitalism.”